body{
    background: #efefef;
    position: relative;
    padding: 20px 0;
}
.certification_main{
    width: 84%;
    margin: 0px 5%;
    background: #fff;
    border-radius: 5px;
    padding: 0 3%;
}
.certification_main .title{
    line-height: 40px;
    font-weight: 600;
    position: relative;
    border-bottom: 1px solid #efefef;
}
.certification_main .title span{
    position: absolute;
    display: block;
    color: royalblue;
    right: 10px;
    top: 0;
}
.certification_main h2{
    font-size: 17px;
    line-height: 40px;
}
.certification_main .answer{
    text-indent:1.5rem;
    padding-top: 5px;
}
.certification_main .images{
    width: 100%;
    padding: 20px 0;
}
.certification_main img{
    display: block;
    width: 100%;
}
.certification_main .foot{
    line-height: 40px;
    border-top: 1px solid #efefef;
    margin-top: 20px;
}
.certification_main .foot  span{
    margin-left: 40px;
}
.certification_main .foot  span:first-child{
    margin-left: 60px;
}
.registered{
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
}
.registered .registered_hide{
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,.3);
    z-index: 10;
}
.registered_main{
    width: 84%;
    height: 330px;
    background: #fff;
    position: fixed;
    z-index: 20;
    top: 50%;
    left: 50%;
    border-radius: 5px;
    transform: translate(-50%,-50%);

}